<!DOCTYPE html><html><head>
      <title>md_for_MMCIF_unit</title>
      <meta charset="utf-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">

      <link rel="stylesheet" href="file:///C:\Users\Nature\.atom\packages\markdown-preview-enhanced\node_modules\@shd101wyy\mume\dependencies\katex\katex.min.css">










      <style>
      /**
 * prism.js Github theme based on GitHub's theme.
 * @author Sam Clarke
 */
code[class*="language-"],
pre[class*="language-"] {
  color: #333;
  background: none;
  font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
  text-align: left;
  white-space: pre;
  word-spacing: normal;
  word-break: normal;
  word-wrap: normal;
  line-height: 1.4;

  -moz-tab-size: 8;
  -o-tab-size: 8;
  tab-size: 8;

  -webkit-hyphens: none;
  -moz-hyphens: none;
  -ms-hyphens: none;
  hyphens: none;
}

/* Code blocks */
pre[class*="language-"] {
  padding: .8em;
  overflow: auto;
  /* border: 1px solid #ddd; */
  border-radius: 3px;
  /* background: #fff; */
  background: #f5f5f5;
}

/* Inline code */
:not(pre) > code[class*="language-"] {
  padding: .1em;
  border-radius: .3em;
  white-space: normal;
  background: #f5f5f5;
}

.token.comment,
.token.blockquote {
  color: #969896;
}

.token.cdata {
  color: #183691;
}

.token.doctype,
.token.punctuation,
.token.variable,
.token.macro.property {
  color: #333;
}

.token.operator,
.token.important,
.token.keyword,
.token.rule,
.token.builtin {
  color: #a71d5d;
}

.token.string,
.token.url,
.token.regex,
.token.attr-value {
  color: #183691;
}

.token.property,
.token.number,
.token.boolean,
.token.entity,
.token.atrule,
.token.constant,
.token.symbol,
.token.command,
.token.code {
  color: #0086b3;
}

.token.tag,
.token.selector,
.token.prolog {
  color: #63a35c;
}

.token.function,
.token.namespace,
.token.pseudo-element,
.token.class,
.token.class-name,
.token.pseudo-class,
.token.id,
.token.url-reference .token.variable,
.token.attr-name {
  color: #795da3;
}

.token.entity {
  cursor: help;
}

.token.title,
.token.title .token.punctuation {
  font-weight: bold;
  color: #1d3e81;
}

.token.list {
  color: #ed6a43;
}

.token.inserted {
  background-color: #eaffea;
  color: #55a532;
}

.token.deleted {
  background-color: #ffecec;
  color: #bd2c00;
}

.token.bold {
  font-weight: bold;
}

.token.italic {
  font-style: italic;
}


/* JSON */
.language-json .token.property {
  color: #183691;
}

.language-markup .token.tag .token.punctuation {
  color: #333;
}

/* CSS */
code.language-css,
.language-css .token.function {
  color: #0086b3;
}

/* YAML */
.language-yaml .token.atrule {
  color: #63a35c;
}

code.language-yaml {
  color: #183691;
}

/* Ruby */
.language-ruby .token.function {
  color: #333;
}

/* Markdown */
.language-markdown .token.url {
  color: #795da3;
}

/* Makefile */
.language-makefile .token.symbol {
  color: #795da3;
}

.language-makefile .token.variable {
  color: #183691;
}

.language-makefile .token.builtin {
  color: #0086b3;
}

/* Bash */
.language-bash .token.keyword {
  color: #0086b3;
}

/* highlight */
pre[data-line] {
  position: relative;
  padding: 1em 0 1em 3em;
}
pre[data-line] .line-highlight-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  background-color: transparent;
  display: block;
  width: 100%;
}

pre[data-line] .line-highlight {
  position: absolute;
  left: 0;
  right: 0;
  padding: inherit 0;
  margin-top: 1em;
  background: hsla(24, 20%, 50%,.08);
  background: linear-gradient(to right, hsla(24, 20%, 50%,.1) 70%, hsla(24, 20%, 50%,0));
  pointer-events: none;
  line-height: inherit;
  white-space: pre;
}

pre[data-line] .line-highlight:before,
pre[data-line] .line-highlight[data-end]:after {
  content: attr(data-start);
  position: absolute;
  top: .4em;
  left: .6em;
  min-width: 1em;
  padding: 0 .5em;
  background-color: hsla(24, 20%, 50%,.4);
  color: hsl(24, 20%, 95%);
  font: bold 65%/1.5 sans-serif;
  text-align: center;
  vertical-align: .3em;
  border-radius: 999px;
  text-shadow: none;
  box-shadow: 0 1px white;
}

pre[data-line] .line-highlight[data-end]:after {
  content: attr(data-end);
  top: auto;
  bottom: .4em;
}html body{font-family:"Helvetica Neue",Helvetica,"Segoe UI",Arial,freesans,sans-serif;font-size:16px;line-height:1.6;color:#333;background-color:#fff;overflow:initial;box-sizing:border-box;word-wrap:break-word}html body>:first-child{margin-top:0}html body h1,html body h2,html body h3,html body h4,html body h5,html body h6{line-height:1.2;margin-top:1em;margin-bottom:16px;color:#000}html body h1{font-size:2.25em;font-weight:300;padding-bottom:.3em}html body h2{font-size:1.75em;font-weight:400;padding-bottom:.3em}html body h3{font-size:1.5em;font-weight:500}html body h4{font-size:1.25em;font-weight:600}html body h5{font-size:1.1em;font-weight:600}html body h6{font-size:1em;font-weight:600}html body h1,html body h2,html body h3,html body h4,html body h5{font-weight:600}html body h5{font-size:1em}html body h6{color:#5c5c5c}html body strong{color:#000}html body del{color:#5c5c5c}html body a:not([href]){color:inherit;text-decoration:none}html body a{color:#08c;text-decoration:none}html body a:hover{color:#00a3f5;text-decoration:none}html body img{max-width:100%}html body>p{margin-top:0;margin-bottom:16px;word-wrap:break-word}html body>ul,html body>ol{margin-bottom:16px}html body ul,html body ol{padding-left:2em}html body ul.no-list,html body ol.no-list{padding:0;list-style-type:none}html body ul ul,html body ul ol,html body ol ol,html body ol ul{margin-top:0;margin-bottom:0}html body li{margin-bottom:0}html body li.task-list-item{list-style:none}html body li>p{margin-top:0;margin-bottom:0}html body .task-list-item-checkbox{margin:0 .2em .25em -1.8em;vertical-align:middle}html body .task-list-item-checkbox:hover{cursor:pointer}html body blockquote{margin:16px 0;font-size:inherit;padding:0 15px;color:#5c5c5c;border-left:4px solid #d6d6d6}html body blockquote>:first-child{margin-top:0}html body blockquote>:last-child{margin-bottom:0}html body hr{height:4px;margin:32px 0;background-color:#d6d6d6;border:0 none}html body table{margin:10px 0 15px 0;border-collapse:collapse;border-spacing:0;display:block;width:100%;overflow:auto;word-break:normal;word-break:keep-all}html body table th{font-weight:bold;color:#000}html body table td,html body table th{border:1px solid #d6d6d6;padding:6px 13px}html body dl{padding:0}html body dl dt{padding:0;margin-top:16px;font-size:1em;font-style:italic;font-weight:bold}html body dl dd{padding:0 16px;margin-bottom:16px}html body code{font-family:Menlo,Monaco,Consolas,'Courier New',monospace;font-size:.85em !important;color:#000;background-color:#f0f0f0;border-radius:3px;padding:.2em 0}html body code::before,html body code::after{letter-spacing:-0.2em;content:"\00a0"}html body pre>code{padding:0;margin:0;font-size:.85em !important;word-break:normal;white-space:pre;background:transparent;border:0}html body .highlight{margin-bottom:16px}html body .highlight pre,html body pre{padding:1em;overflow:auto;font-size:.85em !important;line-height:1.45;border:#d6d6d6;border-radius:3px}html body .highlight pre{margin-bottom:0;word-break:normal}html body pre code,html body pre tt{display:inline;max-width:initial;padding:0;margin:0;overflow:initial;line-height:inherit;word-wrap:normal;background-color:transparent;border:0}html body pre code:before,html body pre tt:before,html body pre code:after,html body pre tt:after{content:normal}html body p,html body blockquote,html body ul,html body ol,html body dl,html body pre{margin-top:0;margin-bottom:16px}html body kbd{color:#000;border:1px solid #d6d6d6;border-bottom:2px solid #c7c7c7;padding:2px 4px;background-color:#f0f0f0;border-radius:3px}@media print{html body{background-color:#fff}html body h1,html body h2,html body h3,html body h4,html body h5,html body h6{color:#000;page-break-after:avoid}html body blockquote{color:#5c5c5c}html body pre{page-break-inside:avoid}html body table{display:table}html body img{display:block;max-width:100%;max-height:100%}html body pre,html body code{word-wrap:break-word;white-space:pre}}.markdown-preview{width:100%;height:100%;box-sizing:border-box}.markdown-preview .pagebreak,.markdown-preview .newpage{page-break-before:always}.markdown-preview pre.line-numbers{position:relative;padding-left:3.8em;counter-reset:linenumber}.markdown-preview pre.line-numbers>code{position:relative}.markdown-preview pre.line-numbers .line-numbers-rows{position:absolute;pointer-events:none;top:1em;font-size:100%;left:0;width:3em;letter-spacing:-1px;border-right:1px solid #999;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.markdown-preview pre.line-numbers .line-numbers-rows>span{pointer-events:none;display:block;counter-increment:linenumber}.markdown-preview pre.line-numbers .line-numbers-rows>span:before{content:counter(linenumber);color:#999;display:block;padding-right:.8em;text-align:right}.markdown-preview .mathjax-exps .MathJax_Display{text-align:center !important}.markdown-preview:not([for="preview"]) .code-chunk .btn-group{display:none}.markdown-preview:not([for="preview"]) .code-chunk .status{display:none}.markdown-preview:not([for="preview"]) .code-chunk .output-div{margin-bottom:16px}.scrollbar-style::-webkit-scrollbar{width:8px}.scrollbar-style::-webkit-scrollbar-track{border-radius:10px;background-color:transparent}.scrollbar-style::-webkit-scrollbar-thumb{border-radius:5px;background-color:rgba(150,150,150,0.66);border:4px solid rgba(150,150,150,0.66);background-clip:content-box}html body[for="html-export"]:not([data-presentation-mode]){position:relative;width:100%;height:100%;top:0;left:0;margin:0;padding:0;overflow:auto}html body[for="html-export"]:not([data-presentation-mode]) .markdown-preview{position:relative;top:0}@media screen and (min-width:914px){html body[for="html-export"]:not([data-presentation-mode]) .markdown-preview{padding:2em calc(50% - 457px + 2em)}}@media screen and (max-width:914px){html body[for="html-export"]:not([data-presentation-mode]) .markdown-preview{padding:2em}}@media screen and (max-width:450px){html body[for="html-export"]:not([data-presentation-mode]) .markdown-preview{font-size:14px !important;padding:1em}}@media print{html body[for="html-export"]:not([data-presentation-mode]) #sidebar-toc-btn{display:none}}html body[for="html-export"]:not([data-presentation-mode]) #sidebar-toc-btn{position:fixed;bottom:8px;left:8px;font-size:28px;cursor:pointer;color:inherit;z-index:99;width:32px;text-align:center;opacity:.4}html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] #sidebar-toc-btn{opacity:1}html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] .md-sidebar-toc{position:fixed;top:0;left:0;width:300px;height:100%;padding:32px 0 48px 0;font-size:14px;box-shadow:0 0 4px rgba(150,150,150,0.33);box-sizing:border-box;overflow:auto;background-color:inherit}html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] .md-sidebar-toc::-webkit-scrollbar{width:8px}html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] .md-sidebar-toc::-webkit-scrollbar-track{border-radius:10px;background-color:transparent}html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] .md-sidebar-toc::-webkit-scrollbar-thumb{border-radius:5px;background-color:rgba(150,150,150,0.66);border:4px solid rgba(150,150,150,0.66);background-clip:content-box}html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] .md-sidebar-toc a{text-decoration:none}html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] .md-sidebar-toc ul{padding:0 1.6em;margin-top:.8em}html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] .md-sidebar-toc li{margin-bottom:.8em}html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] .md-sidebar-toc ul{list-style-type:none}html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] .markdown-preview{left:300px;width:calc(100% -  300px);padding:2em calc(50% - 457px -  150px);margin:0;box-sizing:border-box}@media screen and (max-width:1274px){html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] .markdown-preview{padding:2em}}@media screen and (max-width:450px){html body[for="html-export"]:not([data-presentation-mode])[html-show-sidebar-toc] .markdown-preview{width:100%}}html body[for="html-export"]:not([data-presentation-mode]):not([html-show-sidebar-toc]) .markdown-preview{left:50%;transform:translateX(-50%)}html body[for="html-export"]:not([data-presentation-mode]):not([html-show-sidebar-toc]) .md-sidebar-toc{display:none}
/* Please visit the URL below for more information: */
/*   https://shd101wyy.github.io/markdown-preview-enhanced/#/customize-css */

      </style>
    </head>
    <body for="html-export">
      <div class="mume markdown-preview  ">
      <h1 class="mume-header" id="relationship-between-biological-assembly-and-asymmetric-unit-in-mmcif-format-files">Relationship Between Biological Assembly and Asymmetric Unit in mmCIF Format Files</h1>

<h3 class="mume-header" id="key-concepts">Key Concepts</h3>

<h4 class="mume-header" id="asymmetric-unit">Asymmetric Unit</h4>

<blockquote>
<p>The asymmetric unit is the smallest portion of a crystal structure to which symmetry operations can be applied in order to generate the complete unit cell (the crystal repeating unit). Symmetry operations most common to crystals of biological macromolecules are rotations, translations and screw axes (combinations of rotation and translation).A crystal asymmetric unit may contain:[1]</p>
<ul>
<li>one biological assembly</li>
<li>a portion of a biological assembly</li>
<li>multiple biological assemblies</li>
</ul>
</blockquote>
<h4 class="mume-header" id="biological-assembly">Biological Assembly</h4>

<blockquote>
<p>The biological assembly (also sometimes referred to as the biological unit) is the macromolecular assembly that has either been shown to be or is believed to be the functional form of the molecule. For example, the functional form of hemoglobin has four chains.<br>
Depending on the particular crystal structure, symmetry operations consisting of rotations, translations or their combinations may need to be performed in order to obtain the complete biological assembly. Alternately, a subset of the deposited coordinates may need to be selected to represent the biological assembly. Thus, a biological assembly may be built from: [1]</p>
<ul>
<li><strong>one copy of</strong> the asymmetric unit</li>
<li><strong>multiple copies of</strong> the asymmetric unit</li>
<li><strong>a portion of</strong> the asymmetric unit</li>
</ul>
</blockquote>
<h3 class="mume-header" id="related-items-in-mmcif-format">Related items in mmCIF Format</h3>

<table>
<thead>
<tr>
<th>Key</th>
<th>Category Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>_entity.id</code></td>
<td>One concept on which the PDBx/mmCIF format relies is that of entities. An entity is a chemically distinct part of a structure as represented in the PDBx/mmCIF data file. Data items in the <code>_entity</code> category, describe the chemistry and identity of the molecules under investigation. In any particular entry, there may be multiple copies of a given entity.[2] <a href="http://mmcif.rcsb.org/dictionaries/mmcif_pdbx_v50.dic/Categories/entity.html" title="Link">More Details</a></td>
</tr>
<tr>
<td><code>_entity_poly.entity_id, _entity_poly.pdbx_strand_id, _entity_poly.type</code></td>
<td>Data items in the <code>ENTITY_POLY</code> category record details about the polymer, such as the type of the polymer.[3]</td>
</tr>
<tr>
<td><code>_pdbx_struct_assembly_gen.assembly_id, _pdbx_struct_assembly_gen.oper_expression, _pdbx_struct_assembly_gen.asym_id_list</code></td>
<td>Data items in the <code>PDBX_STRUCT_ASSEMBLY_GEN</code> category record details about the generation of each macromolecular assemblies. The <code>PDBX_STRUCT_ASSEMBLY_GEN</code> data items provide the specifications of the components that constitute that assembly in terms of cartesian transformations.[3]</td>
</tr>
<tr>
<td><code>_pdbx_struct_assembly.oligomeric_count</code></td>
<td>Data items in the <code>PDBX_STRUCT_ASSEMBLY</code> category record details about the structural elements that form macromolecular assemblies.[3]</td>
</tr>
</tbody>
</table>
<h4 class="mume-header" id="explanation">Explanation</h4>

<table>
    <tbody><tr>
        <td>
            The hierarchical frameworks of <b>asym_id</b>s (fig 1)
        </td>
        <td>
          The distribution of <b>asym_id</b>s in biological assemblies (fig 2)
        </td>
    </tr>
    <tr>
        <td>
            <img src="./img/fig_MMCIF_1.png">
        </td>
        <td>
            <img src="./img/fig_MMCIF_2.png">
        </td>
    </tr>
</tbody></table>
<h3 class="mume-header" id="examples">Examples</h3>

<h4 class="mume-header" id="one-copy-of-the-asymmetric-unit">One copy of the asymmetric unit</h4>

<p><code>2ZQT</code><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2193;</mo></mrow><annotation encoding="application/x-tex"></annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8888799999999999em;vertical-align:-0.19444em;"></span><span class="mrel">&#x2193;</span></span></span></span></p>
<table>
    <tbody><tr>
        <td>
            The <b>asymmetric unit</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=2zqt">2zqt</a>
        </td>
        <td>
            The <b>biological assembly</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=2zqt">2zqt</a>
        </td>
    </tr>
    <tr>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/zq/2zqt/2zqt.pdb-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/zq/2zqt/2zqt.pdb1-500.jpg">
        </td>
    </tr>
</tbody></table>
<pre data-role="codeBlock" data-info="c" class="language-c">pdb_id                                                                                    <span class="token number">2</span>zqt
_entity<span class="token punctuation">.</span>id                                                                        <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>entity_id                                                                     <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>pdbx_strand_id                                                                <span class="token punctuation">[</span>A<span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>type                                                             <span class="token punctuation">[</span><span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>assembly_id                                                      <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>oper_expression                                                  <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>asym_id_list                                               <span class="token punctuation">[</span>A<span class="token punctuation">,</span>B<span class="token punctuation">,</span>C<span class="token punctuation">,</span>D<span class="token punctuation">]</span>
_pdbx_struct_assembly<span class="token punctuation">.</span>oligomeric_count                                                     <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>
</pre><p><code>_pdbx_struct_assembly_gen.asym_id_list</code> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x21D2;</mo></mrow><annotation encoding="application/x-tex">\Rightarrow</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.36687em;vertical-align:0em;"></span><span class="mrel">&#x21D2;</span></span></span></span> [A,<s>B,C,D]</s></p>
<hr>
<p><code>6IWG</code><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2193;</mo></mrow><annotation encoding="application/x-tex"></annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8888799999999999em;vertical-align:-0.19444em;"></span><span class="mrel">&#x2193;</span></span></span></span></p>
<table>
    <tbody><tr>
        <td>
            The <b>asymmetric unit</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=6iwg">6iwg</a>
        </td>
        <td>
            The <b>biological assembly</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=6iwg">6iwg</a>
        </td>
    </tr>
    <tr>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/iw/6iwg/6iwg.pdb-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/iw/6iwg/6iwg.pdb1-500.jpg">
        </td>
    </tr>
</tbody></table>
<pre data-role="codeBlock" data-info="c" class="language-c">pdb_id                                                                                    <span class="token number">6</span>iwg
_entity<span class="token punctuation">.</span>id                                                               <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">6</span><span class="token punctuation">,</span> <span class="token number">7</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>entity_id                                                               <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>pdbx_strand_id                                                          <span class="token punctuation">[</span>A<span class="token punctuation">,</span> B<span class="token punctuation">,</span> C<span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>type                             <span class="token punctuation">[</span><span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>assembly_id                                                      <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>oper_expression                                                  <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>asym_id_list       <span class="token punctuation">[</span>A<span class="token punctuation">,</span>B<span class="token punctuation">,</span>C<span class="token punctuation">,</span>D<span class="token punctuation">,</span>E<span class="token punctuation">,</span>F<span class="token punctuation">,</span>G<span class="token punctuation">,</span>H<span class="token punctuation">,</span>I<span class="token punctuation">,</span>J<span class="token punctuation">,</span>K<span class="token punctuation">,</span>L<span class="token punctuation">,</span>M<span class="token punctuation">,</span>N<span class="token punctuation">,</span>O<span class="token punctuation">,</span>P<span class="token punctuation">,</span>Q<span class="token punctuation">,</span>R<span class="token punctuation">,</span>S<span class="token punctuation">,</span>T<span class="token punctuation">,</span>U<span class="token punctuation">,</span>V<span class="token punctuation">,</span>W<span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span>
_pdbx_struct_assembly<span class="token punctuation">.</span>oligomeric_count                                                     <span class="token punctuation">[</span><span class="token number">3</span><span class="token punctuation">]</span>
</pre><p><code>_pdbx_struct_assembly_gen.asym_id_list</code> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x21D2;</mo></mrow><annotation encoding="application/x-tex">\Rightarrow</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.36687em;vertical-align:0em;"></span><span class="mrel">&#x21D2;</span></span></span></span> [A,B,C,<s>D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W</s>...</p>
<hr>
<h4 class="mume-header" id="multiple-copies-of-the-asymmetric-unit">Multiple copies of the asymmetric unit</h4>

<p><code>1HHO</code><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2193;</mo></mrow><annotation encoding="application/x-tex"></annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8888799999999999em;vertical-align:-0.19444em;"></span><span class="mrel">&#x2193;</span></span></span></span></p>
<table>
    <tbody><tr>
        <td>
            The <b>asymmetric unit</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=1hho">1hho</a>
        </td>
        <td>
            The <b>biological assembly</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=1hho">1hho</a>
        </td>
    </tr>
    <tr>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/hh/1hho/1hho.pdb-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/hh/1hho/1hho.pdb1-500.jpg">
        </td>
    </tr>
</tbody></table>
<pre data-role="codeBlock" data-info="c" class="language-c">pdb_id                                                                                    <span class="token number">1</span>hho
_entity<span class="token punctuation">.</span>id                                                                  <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">6</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>entity_id                                                                  <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>pdbx_strand_id                                                             <span class="token punctuation">[</span>A<span class="token punctuation">,</span> B<span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>type                                             <span class="token punctuation">[</span><span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>assembly_id                                                      <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>oper_expression                                                <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span><span class="token number">2</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>asym_id_list                                     <span class="token punctuation">[</span>A<span class="token punctuation">,</span>B<span class="token punctuation">,</span>C<span class="token punctuation">,</span>D<span class="token punctuation">,</span>E<span class="token punctuation">,</span>F<span class="token punctuation">,</span>G<span class="token punctuation">,</span>H<span class="token punctuation">,</span>I<span class="token punctuation">]</span>
_pdbx_struct_assembly<span class="token punctuation">.</span>oligomeric_count                                                     <span class="token punctuation">[</span><span class="token number">4</span><span class="token punctuation">]</span>
</pre><p><code>_pdbx_struct_assembly_gen.asym_id_list</code> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x21D2;</mo></mrow><annotation encoding="application/x-tex">\Rightarrow</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.36687em;vertical-align:0em;"></span><span class="mrel">&#x21D2;</span></span></span></span> [A,B,<s>C,D,E,F,G,H,I</s>] <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2217;</mo><mn>2</mn></mrow><annotation encoding="application/x-tex">* 2</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.64444em;vertical-align:0em;"></span><span class="mord">&#x2217;</span><span class="mord">2</span></span></span></span></p>
<hr>
<p><code>2AKE</code><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2193;</mo></mrow><annotation encoding="application/x-tex"></annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8888799999999999em;vertical-align:-0.19444em;"></span><span class="mrel">&#x2193;</span></span></span></span></p>
<table>
    <tbody><tr>
        <td>
            The <b>asymmetric unit</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=2ake">2ake</a>
        </td>
        <td>
            The <b>biological assembly</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=2ake">2ake</a>
        </td>
    </tr>
    <tr>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/ak/2ake/2ake.pdb-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/ak/2ake/2ake.pdb1-500.jpg">
        </td>
    </tr>
</tbody></table>
<pre data-role="codeBlock" data-info="c" class="language-c">pdb_id                                                                                    <span class="token number">2</span>ake
_entity<span class="token punctuation">.</span>id                                                                        <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>entity_id                                                                  <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>pdbx_strand_id                                                             <span class="token punctuation">[</span>B<span class="token punctuation">,</span> A<span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>type                                         <span class="token punctuation">[</span>polyribonucleotide<span class="token punctuation">,</span> <span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>assembly_id                                                      <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>oper_expression                                                <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span><span class="token number">2</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>asym_id_list                                               <span class="token punctuation">[</span>A<span class="token punctuation">,</span>B<span class="token punctuation">,</span>C<span class="token punctuation">,</span>D<span class="token punctuation">]</span>
_pdbx_struct_assembly<span class="token punctuation">.</span>oligomeric_count                                                     <span class="token punctuation">[</span><span class="token number">4</span><span class="token punctuation">]</span>
</pre><p><code>_pdbx_struct_assembly_gen.asym_id_list</code> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x21D2;</mo></mrow><annotation encoding="application/x-tex">\Rightarrow</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.36687em;vertical-align:0em;"></span><span class="mrel">&#x21D2;</span></span></span></span> [A,B,<s>C,D</s>] <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2217;</mo><mn>2</mn></mrow><annotation encoding="application/x-tex">* 2</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.64444em;vertical-align:0em;"></span><span class="mord">&#x2217;</span><span class="mord">2</span></span></span></span></p>
<hr>
<h4 class="mume-header" id="a-portion-of-the-asymmetric-unit">A portion of the asymmetric unit</h4>

<p><code>2XYN</code><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2193;</mo></mrow><annotation encoding="application/x-tex"></annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8888799999999999em;vertical-align:-0.19444em;"></span><span class="mrel">&#x2193;</span></span></span></span></p>
<table>
    <tbody><tr>
        <td>
            The <b>asymmetric unit</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=2xyn">2xyn</a>
        </td>
        <td>
            The <b>biological assembly 1</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=2xyn">2xyn</a>
        </td>
        <td>
            The <b>biological assembly 2</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=2xyn">2xyn</a>
        </td>
        <td>
            The <b>biological assembly 3</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=2xyn">2xyn</a>
        </td>
    </tr>
    <tr>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/xy/2xyn/2xyn.pdb-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/xy/2xyn/2xyn.pdb1-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/xy/2xyn/2xyn.pdb2-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/xy/2xyn/2xyn.pdb3-500.jpg">
        </td>
    </tr>
</tbody></table>
<pre data-role="codeBlock" data-info="c" class="language-c">pdb_id                                                                                    <span class="token number">2</span>xyn
_entity<span class="token punctuation">.</span>id                                                                     <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>entity_id                                                                     <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>pdbx_strand_id                                                            <span class="token punctuation">[</span>A<span class="token punctuation">,</span>B<span class="token punctuation">,</span>C<span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>type                                                             <span class="token punctuation">[</span><span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>assembly_id                                                <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>oper_expression                                            <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>asym_id_list                       <span class="token punctuation">[</span>A<span class="token punctuation">,</span>D<span class="token punctuation">,</span>E<span class="token punctuation">,</span>F<span class="token punctuation">,</span>G<span class="token punctuation">,</span>N<span class="token punctuation">,</span> B<span class="token punctuation">,</span>H<span class="token punctuation">,</span>I<span class="token punctuation">,</span>J<span class="token punctuation">,</span>O<span class="token punctuation">,</span> C<span class="token punctuation">,</span>K<span class="token punctuation">,</span>L<span class="token punctuation">,</span>M<span class="token punctuation">]</span>
_pdbx_struct_assembly<span class="token punctuation">.</span>oligomeric_count                                               <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">]</span>
</pre><p><code>_pdbx_struct_assembly_gen.asym_id_list</code> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x21D2;</mo></mrow><annotation encoding="application/x-tex">\Rightarrow</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.36687em;vertical-align:0em;"></span><span class="mrel">&#x21D2;</span></span></span></span> [A,<s>D,E,F,G,N,</s> B,<s>H,I,J,O,</s> C,<s>K,L,M</s>]</p>
<hr>
<p><code>3A6P</code><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2193;</mo></mrow><annotation encoding="application/x-tex"></annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8888799999999999em;vertical-align:-0.19444em;"></span><span class="mrel">&#x2193;</span></span></span></span></p>
<table>
    <tbody><tr>
        <td>
            The <b>asymmetric unit</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=3a6p">3a6p</a>
        </td>
        <td>
            The <b>biological assembly 1</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=3a6p">3a6p</a>
        </td>
        <td>
            The <b>biological assembly 2</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=3a6p">3a6p</a>
        </td>
    </tr>
    <tr>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/a6/3a6p/3a6p.pdb-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/a6/3a6p/3a6p.pdb1-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/a6/3a6p/3a6p.pdb2-500.jpg">
        </td>
    </tr>
</tbody></table>
<pre data-role="codeBlock" data-info="c" class="language-c">pdb_id                                                                                    <span class="token number">3</span>a6p
_entity<span class="token punctuation">.</span>id                                                               <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">6</span><span class="token punctuation">,</span> <span class="token number">7</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>entity_id                                                         <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>pdbx_strand_id                                          <span class="token punctuation">[</span>A<span class="token punctuation">,</span>F<span class="token punctuation">,</span> B<span class="token punctuation">,</span>G<span class="token punctuation">,</span> C<span class="token punctuation">,</span>H<span class="token punctuation">,</span> D<span class="token punctuation">,</span>I<span class="token punctuation">,</span> E<span class="token punctuation">,</span>J<span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>type                            <span class="token punctuation">[</span><span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>assembly_id                                                   <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>oper_expression                                               <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>asym_id_list                          <span class="token punctuation">[</span>A<span class="token punctuation">,</span>B<span class="token punctuation">,</span>C<span class="token punctuation">,</span>D<span class="token punctuation">,</span>E<span class="token punctuation">,</span>K<span class="token punctuation">,</span>L<span class="token punctuation">,</span> F<span class="token punctuation">,</span>G<span class="token punctuation">,</span>H<span class="token punctuation">,</span>I<span class="token punctuation">,</span>J<span class="token punctuation">,</span>M<span class="token punctuation">,</span>N<span class="token punctuation">]</span>
_pdbx_struct_assembly<span class="token punctuation">.</span>oligomeric_count                                                  <span class="token punctuation">[</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span>
</pre><p><code>_pdbx_struct_assembly_gen.asym_id_list</code> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x21D2;</mo></mrow><annotation encoding="application/x-tex">\Rightarrow</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.36687em;vertical-align:0em;"></span><span class="mrel">&#x21D2;</span></span></span></span> [A,B,C,D,E,<s>K,L,</s> F,G,H,I,J,<s>M,N</s>]</p>
<hr>
<h4 class="mume-header" id="special">Special</h4>

<h5 class="mume-header" id="a-portion-of-the-asymmetric-unit-a-portion-of-the-asymmetric-unit-multiple-copies-of-the-asymmetric-unit">a portion of the asymmetric unit, (a portion of the asymmetric unit + multiple copies of the asymmetric unit)</h5>

<p><code>1DFV</code><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2193;</mo></mrow><annotation encoding="application/x-tex"></annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8888799999999999em;vertical-align:-0.19444em;"></span><span class="mrel">&#x2193;</span></span></span></span></p>
<table>
    <tbody><tr>
        <td>
            The <b>asymmetric unit</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=1dfv">1dfv</a>
        </td>
        <td>
            The <b>biological assembly 1</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=1dfv">1dfv</a>
        </td>
        <td>
            The <b>biological assembly 2</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=1dfv">1dfv</a>
        </td>
        <td>
            The <b>biological assembly 3</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=1dfv">1dfv</a>
        </td>
    </tr>
    <tr>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/df/1dfv/1dfv.pdb-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/df/1dfv/1dfv.pdb1-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/df/1dfv/1dfv.pdb2-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/df/1dfv/1dfv.pdb3-500.jpg">
        </td>
    </tr>
</tbody></table>
<pre data-role="codeBlock" data-info="c" class="language-c">pdb_id                                                                                    <span class="token number">1</span>dfv
_entity<span class="token punctuation">.</span>id                                                                     <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>entity_id                                                                     <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>pdbx_strand_id                                                              <span class="token punctuation">[</span>A<span class="token punctuation">,</span>B<span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>type                                                             <span class="token punctuation">[</span><span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>assembly_id                                                <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>oper_expression                                          <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span><span class="token number">2</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>asym_id_list                         <span class="token punctuation">[</span>A<span class="token punctuation">,</span>C<span class="token punctuation">,</span>D<span class="token punctuation">,</span>E<span class="token punctuation">,</span>F<span class="token punctuation">,</span>I<span class="token punctuation">,</span> B<span class="token punctuation">,</span>G<span class="token punctuation">,</span>H<span class="token punctuation">,</span>J<span class="token punctuation">,</span> B<span class="token punctuation">,</span>G<span class="token punctuation">,</span>H<span class="token punctuation">,</span>J<span class="token punctuation">]</span>
_pdbx_struct_assembly<span class="token punctuation">.</span>oligomeric_count                                               <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span>
</pre><p><code>_pdbx_struct_assembly_gen.asym_id_list</code> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x21D2;</mo></mrow><annotation encoding="application/x-tex">\Rightarrow</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.36687em;vertical-align:0em;"></span><span class="mrel">&#x21D2;</span></span></span></span> [A,<s>C,D,E,F,I,</s> B,<s>G,H,J,</s> B,<s>G,H,J</s>]</p>
<ul>
<li>BioUnit1: A,<s>C,D,E,F,I,</s> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2192;</mo><mo>&#x2217;</mo><mn>1</mn></mrow><annotation encoding="application/x-tex">\rightarrow * 1</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.36687em;vertical-align:0em;"></span><span class="mrel">&#x2192;</span><span class="mspace" style="margin-right:0.2777777777777778em;"></span></span><span class="base"><span class="strut" style="height:0.64444em;vertical-align:0em;"></span><span class="mord">&#x2217;</span><span class="mord">1</span></span></span></span></li>
<li>BioUnit2: B,<s>G,H,J,</s> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2192;</mo><mo>&#x2217;</mo><mn>1</mn></mrow><annotation encoding="application/x-tex">\rightarrow * 1</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.36687em;vertical-align:0em;"></span><span class="mrel">&#x2192;</span><span class="mspace" style="margin-right:0.2777777777777778em;"></span></span><span class="base"><span class="strut" style="height:0.64444em;vertical-align:0em;"></span><span class="mord">&#x2217;</span><span class="mord">1</span></span></span></span></li>
<li>BioUnit3: B,<s>G,H,J,</s><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2192;</mo><mo>&#x2217;</mo><mn>2</mn></mrow><annotation encoding="application/x-tex">\rightarrow * 2</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.36687em;vertical-align:0em;"></span><span class="mrel">&#x2192;</span><span class="mspace" style="margin-right:0.2777777777777778em;"></span></span><span class="base"><span class="strut" style="height:0.64444em;vertical-align:0em;"></span><span class="mord">&#x2217;</span><span class="mord">2</span></span></span></span></li>
</ul>
<hr>
<h5 class="mume-header" id="a-portion-of-the-asymmetric-unit-multiple-copies-of-the-asymmetric-unit">a portion of the asymmetric unit + multiple copies of the asymmetric unit</h5>

<p><code>3HL2</code><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x2193;</mo></mrow><annotation encoding="application/x-tex"></annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.8888799999999999em;vertical-align:-0.19444em;"></span><span class="mrel">&#x2193;</span></span></span></span></p>
<table>
    <tbody><tr>
        <td>
            The <b>asymmetric unit</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=3hl2">3hl2</a>
        </td>
        <td>
            The <b>biological assembly 1</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=3hl2">3hl2</a>
        </td>
        <td>
            The <b>biological assembly 2</b> of PDB ID <a href="http://www.rcsb.org/pdb/explore.do?structureId=3hl2">3hl2</a>
        </td>
    </tr>
    <tr>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/hl/3hl2/3hl2.pdb-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/hl/3hl2/3hl2.pdb1-500.jpg">
        </td>
        <td>
            <img src="https://cdn.rcsb.org/images/rutgers/hl/3hl2/3hl2.pdb2-500.jpg">
        </td>
    </tr>
</tbody></table>
<pre data-role="codeBlock" data-info="c" class="language-c">pdb_id                                                                                    <span class="token number">3</span>hl2
_entity<span class="token punctuation">.</span>id                                                                  <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">4</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">6</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>entity_id                                                                  <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>pdbx_strand_id                                                       <span class="token punctuation">[</span>A<span class="token punctuation">,</span>B<span class="token punctuation">,</span>C<span class="token punctuation">,</span>D<span class="token punctuation">,</span> E<span class="token punctuation">]</span>
_entity_poly<span class="token punctuation">.</span>type                                         <span class="token punctuation">[</span><span class="token function">polypeptide</span><span class="token punctuation">(</span>L<span class="token punctuation">)</span><span class="token punctuation">,</span> polyribonucleotide<span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>assembly_id                                             <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>oper_expression                                         <span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">]</span>
_pdbx_struct_assembly_gen<span class="token punctuation">.</span>asym_id_list       <span class="token punctuation">[</span>A<span class="token punctuation">,</span>B<span class="token punctuation">,</span>F<span class="token punctuation">,</span>G<span class="token punctuation">,</span>H<span class="token punctuation">,</span>I<span class="token punctuation">,</span>J<span class="token punctuation">,</span>K<span class="token punctuation">,</span>Q<span class="token punctuation">,</span>R<span class="token punctuation">,</span> A<span class="token punctuation">,</span>B<span class="token punctuation">,</span>E<span class="token punctuation">,</span>F<span class="token punctuation">,</span>G<span class="token punctuation">,</span>H<span class="token punctuation">,</span>I<span class="token punctuation">,</span>J<span class="token punctuation">,</span>K<span class="token punctuation">,</span>Q<span class="token punctuation">,</span>R<span class="token punctuation">,</span>U<span class="token punctuation">,</span> C<span class="token punctuation">,</span>D<span class="token punctuation">,</span>L<span class="token punctuation">,</span>M<span class="token punctuation">,</span>N<span class="token punctuation">,</span>O<span class="token punctuation">,</span>P<span class="token punctuation">,</span>S<span class="token punctuation">,</span>T<span class="token punctuation">,</span> C<span class="token punctuation">,</span>D<span class="token punctuation">,</span>E<span class="token punctuation">,</span>L<span class="token punctuation">,</span>M<span class="token punctuation">,</span>N<span class="token punctuation">,</span>O<span class="token punctuation">,</span>P<span class="token punctuation">,</span>S<span class="token punctuation">,</span>T<span class="token punctuation">,</span>U<span class="token punctuation">]</span>
_pdbx_struct_assembly<span class="token punctuation">.</span>oligomeric_count                                                  <span class="token punctuation">[</span><span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">]</span>
</pre><p><code>_pdbx_struct_assembly_gen.asym_id_list</code> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>&#x21D2;</mo></mrow><annotation encoding="application/x-tex">\Rightarrow</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.36687em;vertical-align:0em;"></span><span class="mrel">&#x21D2;</span></span></span></span> [A,B,<s>F,G,H,I,J,K,Q,R,</s> A,B,E,<s>F,G,H,I,J,K,Q,R,U,</s> C,D,<s>L,M,N,O,P,S,T,</s> C,D,E,<s>L,M,N,O,P,S,T,U</s>]</p>
<ul>
<li>BioUnit1: A,B,<s>F,G,H,I,J,K,Q,R,</s> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>+</mo></mrow><annotation encoding="application/x-tex">+</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.66666em;vertical-align:-0.08333em;"></span><span class="mord">+</span></span></span></span> A,B,E,<s>F,G,H,I,J,K,Q,R,U,</s></li>
<li>BioUnit2: C,D,<s>L,M,N,O,P,S,T,</s> <span class="katex"><span class="katex-mathml"><math><semantics><mrow><mo>+</mo></mrow><annotation encoding="application/x-tex">+</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.66666em;vertical-align:-0.08333em;"></span><span class="mord">+</span></span></span></span> C,D,E,<s>L,M,N,O,P,S,T,U</s></li>
</ul>
<hr>
<h3 class="mume-header" id="reference">Reference</h3>

<blockquote>
<p>[1] <a href="http://pdb101.rcsb.org/learn/guide-to-understanding-pdb-data/biological-assemblies#Anchor-BioUnit">http://pdb101.rcsb.org/learn/guide-to-understanding-pdb-data/biological-assemblies#Anchor-BioUnit</a><br>
[2] <a href="https://pdb101.rcsb.org/learn/guide-to-understanding-pdb-data/beginner%E2%80%99s-guide-to-pdb-structures-and-the-pdbx-mmcif-format">https://pdb101.rcsb.org/learn/guide-to-understanding-pdb-data/beginner&#x2019;s-guide-to-pdb-structures-and-the-pdbx-mmcif-format</a><br>
[3] <a href="http://mmcif.rcsb.org/pdbx-mmcif-home-page.html">http://mmcif.rcsb.org/pdbx-mmcif-home-page.html</a><br>
[4] <a href="http://proteopedia.org/wiki/index.php/Biological_Unit">http://proteopedia.org/wiki/index.php/Biological_Unit</a></p>
</blockquote>

      </div>











    </body></html>
